Looking after your boiler means that you need to pay attention to it to make sure that you are aware of when something goes wrong with it. As it happens, this should actually be fairly straightforward to do as long as you are paying attention to the boiler and looking out for any signs that it might need fixing or replacing. One common sign that this is the case is when you have water leaking from the boiler - but what does this mean, and what can you do about it?